JP2021157110A - Display device and control method thereof - Google Patents

Abstract

To provide a display device configured to execute desired processing by touch operation when display error occurs, and a control method of the display device.SOLUTION: A display device includes a panel unit and a control unit. The panel unit includes a plurality of electrodes for displaying images and detecting touches. When no image-display error is detected, the control unit controls the panel unit in a first mode, or controls the panel unit in a second mode when the error is detected. The control unit displays, in the first mode, first image data acquired from an in-vehicle system on the panel unit, calculates a touch position on the basis of acquired touch detection signals from the touch unit, and outputs the touch position to the in-vehicle system. The control unit displays, in the second mode, second image data stored in advance on the panel unit, determines whether a touch has been made or not on the basis of the touch detection signals acquired from the panel unit, and outputs an instruction to the in-vehicle system to execute predetermined processing when the touch is determined.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a display device and a method for controlling the display device.

Conventionally, an in-vehicle system including a plurality of display devices, a video output device that outputs image information to the display devices, and a vehicle signal generation device is known. In this type of in-vehicle system, when any of a plurality of display devices fails, the vehicle signal generator notifies the normal display device of the failure of the display device, for example, the minimum safety information required for driving. There is a technique for displaying the above on a normal display device (see, for example, Patent Document 1).

JP-A-2018-021989

However, the conventional technique presupposes a plurality of display devices. For example, when there is only one display device, the security information cannot be displayed, which may cause confusion for the occupants.

An object to be solved by the present disclosure is to provide a display device and a control method of the display device that can give a sense of security to the occupant even when an abnormality occurs in the image display.

The display device of the present disclosure includes a panel unit and a control unit. The panel portion has a plurality of electrodes for displaying an image and detecting a touch. The control unit controls the panel unit in the first mode when an abnormality related to the image display is not detected, and controls the panel unit in the second mode when the abnormality is detected. Further, in the first mode, the control unit displays the first image data acquired from the in-vehicle system on the panel unit, and calculates the touch position based on the touch detection signal acquired from the panel unit. The touch position is output to the in-vehicle system, and in the second mode, the second image data stored in advance is displayed on the panel unit, and the presence or absence of touch is determined based on the touch detection signal acquired from the panel unit. Then, when the touch is made, an execution command for a predetermined process is output to the in-vehicle system.

According to the display device and the control method of the display device according to the present disclosure, it is possible to give a sense of security to the occupant even when an abnormality occurs in the image display.

FIG. 1 is a block diagram showing a configuration example of a display system according to the first embodiment. FIG. 2 is a diagram showing an example of mode information. FIG. 3 is a sequence diagram showing an operation example of the display system in the normal mode. FIG. 4 is a sequence diagram showing an operation example of the display system in the specific mode. FIG. 5 is a diagram showing a screen example of the second image data in the panel unit. FIG. 6 is a diagram showing a screen example of the second image data in the panel unit. FIG. 7 is a diagram showing an example of dividing the screen. FIG. 8 is a diagram showing an example of dividing the screen. FIG. 9 is a diagram showing an example of dividing the screen. FIG. 10 is a sequence diagram showing an operation example of the display system according to the second embodiment. FIG. 11 is a block diagram showing a configuration example of the display system according to the third embodiment. FIG. 12 is a sequence diagram showing an operation example of the display system in the specific mode according to the third embodiment. FIG. 13 is a diagram showing a configuration example of an in-vehicle device according to a modified example. FIG. 14 is a diagram showing a configuration example of a display system according to a modified example. FIG. 15 is a diagram showing a screen example according to a modified example.

Hereinafter, embodiments of the display device and the control method of the display device according to the present disclosure will be described with reference to the accompanying drawings.

In addition, the first to third embodiments will be sequentially described below. The first and second embodiments are cases where the display device is an in-cell type, and the third embodiment is a case where the display device is an out-cell type.

<First Embodiment>
First, the display system S including the display device 1 according to the first embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration example of the display system S according to the first embodiment. The display system S is a system mounted on a vehicle such as an automobile, and is connected to various peripheral devices 100 via a bus B such as CAN (Control Area Network). The display device 1, the host 10, and the peripheral device 100 may be connected to each other wirelessly or by wire. When connected wirelessly, UWB (Ultra Wide Band) used in 5th generation mobile communication systems (5G) and the like, and wireless communication using other frequency bands can be performed.

The peripheral device 100 includes a camera, a sensor for detecting vehicle information such as a vehicle speed sensor, an ECU (Electronic Control Unit) for controlling the vehicle, and the like. The peripheral device 100 outputs various information to the display system S and executes each process according to an instruction from the display system S.

In the following, the peripheral device 100 and the host 10 will be referred to as an in-vehicle system, or the peripheral device 100 and the host 10 will be collectively referred to as an in-vehicle system. That is, other devices other than the display device 1 may be collectively referred to as an in-vehicle system.

The display system S includes a display device 1 and a host 10. The host 10 includes, for example, a control device 11. The control device 11 is, for example, a CPU, and is also called a host CPU. The control device 11 outputs the image data (first image data) and the control data to the display device 1 to control the display device 1.

The first image data is image data generated by the control device 11 or image data input from a peripheral device. The first image data is, for example, image data related to navigation and image data related to entertainment such as television.

The control data is data for controlling the display device 1. Specifically, the control data includes information such as the display timing of the first image data and the timing of touch detection.

The display device 1 includes a control unit 2, a storage unit 3, and a panel unit 4. The control unit 2 includes a panel control unit 20, a first drive unit 21, a second drive unit 22, and a data detection unit 23. The storage unit 3 stores the image information 31 and the mode information 32.

The panel unit 4 is used, for example, as a center display in the vehicle interior on which a screen related to navigation or the like is displayed. Further, the panel unit 4 is an in-cell type IPS (In Plane Switching) type liquid crystal display device, and can perform touch detection as well as image display.

Specifically, the panel unit 4 has a plurality of electrodes 41 shared in image display and touch detection. More specifically, the panel unit 4 which is an in-cell type touch display divides one unit frame period into a plurality of display periods and a plurality of touch detection periods, and arranges the respective periods alternately. Further, one screen is divided into a plurality of touch detection areas 530a to 530d (see FIG. 7), and touches are detected in different touch detection areas for each touch detection period, so that touch detection for one screen can be performed in a unit frame period. Run. Each touch detection area is also called a scan block.

Further, the panel unit 4 can adopt, for example, a so-called capacitance method in which the electrode 41 is configured as a capacitor and touch detection is performed by changing the capacitance of the capacitor. Further, the capacitance type panel unit 4 may be configured as a self-capacitance type or a mutual capacity type.

Here, in the display device 1, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an I / F, and the like are connected to each other by a bus, and a normal computer is used. It has a hardware configuration.

The CPU is an arithmetic unit that controls the display device 1 according to the embodiment, and executes the functions of the control unit 2 (panel control unit 20 to data detection unit 23). The details of each function of the control unit 2 (panel control unit 20 to data detection unit 23) will be described later.

The ROM corresponds to the storage unit 3 and stores a program or the like that realizes processing by the CPU. The RAM corresponds to the storage unit 3 and stores data necessary for processing by the CPU. The I / F is an interface for transmitting and receiving data.

A program for executing various processes executed by the display device 1 according to the embodiment is provided by being incorporated in a ROM or the like in advance. The program executed by the display device 1 according to the embodiment is provided by being stored in a computer-readable storage medium (for example, a flash memory) in a file in a format that can be installed in the display device 1 or in an executable format. It may be configured to do so.

As shown in FIG. 1, the storage unit 3 stores the image information 31 and the mode information 32. The image information 31 is image data (second image data) stored in the storage unit 3 in advance, and specifically, OSD (On-Screen Display) data. The image information 31 includes icon image data 31a (see FIG. 6), text data 31b related to the icon image data 31a, and the like, and details of such points will be described later.

The mode information 32 is information including a program related to the operation mode of the control unit 2. FIG. 2 is a diagram showing an example of mode information 32. Note that FIG. 2 schematically shows the mode information 32.

As shown in FIG. 2, the mode information 32 has two operation modes, a normal mode M1 (first mode) and a specific mode M2 (second mode). The control unit 2 selects one of the operation modes based on the presence or absence of an abnormality related to the display of the first image data acquired from the control device 11. The abnormalities related to the display of the first image data include, for example, an abnormality of the signal indicating the first image data output from the control device 11, a communication abnormality between the host 10 and the display device 1, and the display of the panel unit 4. There is something wrong.

The abnormality detection process related to the display of the first image data may be performed by the control unit 2 or may be performed by another external device. Further, the display abnormality of the panel unit 4 may be a partial abnormality of the display area of the panel unit 4, or may be an abnormality of the entire area. The display abnormality of the panel unit 4 can be detected by, for example, a defect of the signal line connected to the electrode 41, a circuit defect of the panel control unit 20, or the like.

In the first embodiment, the operation when the abnormality related to the display of the first image data is the abnormality of the signal indicating the first image data output from the control device 11 or the display abnormality of the panel unit 4 will be described. In the second embodiment, the operation in the case of communication abnormality (blocking) between the host 10 and the display device 1 will be described. That is, in the first embodiment, it is assumed that the communication between the host 10 and the display device 1 is normal.

When the control unit 2 does not detect an abnormality related to the display of the first image data, the control unit 2 selects the normal mode M1 as the operation mode and controls the panel unit 4 in the normal mode M1. Further, when an abnormality related to the display of the first image data is detected, the control unit 2 selects the specific mode M2 as the operation mode and controls the panel unit 4 in the specific mode M2. The operation sequence in the normal mode M1 and the operation sequence in the specific mode M2 will be described later in FIGS. 3 and 4.

Each function of the control unit 2 (panel control unit 20 to data detection unit 23) will be described.

The panel control unit 20 controls image display and touch detection in the panel unit 4 according to various data acquired from the control device 11. Specifically, the panel control unit 20 controls the drive timing of each of the first drive unit 21 and the second drive unit 22, the data detection timing (touch detection timing) by the data detection unit 23, and the like.

Further, as will be described in detail later, when the operation mode is the normal mode M1, the panel control unit 20 acquires the first image data from the control device 11 and displays it on the panel unit 4. Further, when the operation mode is the specific mode M2, the panel control unit 20 reads out the second image data of the image information stored in its own storage unit 3 and displays it on the panel unit 4.

Then, the panel control unit 20 stores the information of the display position of the second image data in the storage unit 3 in the display area of the panel unit 4. The panel control unit 20 may notify the data detection unit 23 of the information on the display position of the second image data.

First, the first drive unit 21 generates a reference clock signal according to the control of the panel control unit 20. Subsequently, image data (first image data or second image data) is acquired from the panel control unit 20, and the first image data is converted into a video signal. This video signal is synchronized with the reference clock signal. Then, the first drive unit 21 outputs a video signal to the electrode 41 of the panel unit 4 at the drive timing (display period) notified from the panel control unit 20, so that the electrode 41 of the panel unit 4 is imaged during the display period. Driven for data display.

Further, the first drive unit 21 outputs the generated reference clock signal to the second drive unit 22.

The second drive unit 22 generates a touch drive signal TX based on a reference voltage which is a predetermined fixed voltage according to the control of the panel control unit 20. This touch drive signal TX is synchronized with the reference clock signal. The touch drive signal TX may be a rectangular wave or a sine wave.

Then, the second drive unit 22 outputs the touch drive signal TX to the electrode 41 of the panel unit 4 during the touch detection period, and outputs a reference voltage signal to the electrode 41 of the panel unit 4 during the display period. During the touch detection period, the electrode 41 of the panel unit 4 is driven for touch detection.

The data detection unit 23 receives the touch detection signal RX based on the touch drive signal TX from each of the plurality of electrodes 41 to which the touch drive signal TX is supplied, and calculates the detection value based on the touch detection signal RX. Such a detected value is output to the panel control unit 20 and used for the touch determination in the panel control unit 20.

Specifically, the data detection unit 23 integrates the touch detection signal RX received from each electrode 41, and calculates the difference between the integrated value and the reference value as the detection value for each pulse timing of the touch drive signal TX. .. For example, when a 3-pulse touch drive signal TX is output to each electrode 41 during one touch detection period, three touch detection signals RX are obtained from each electrode 41 during one touch detection period, so that the number of detected values (Number of integrated values) is three.

That is, with respect to the touch detection signal RX received from one electrode 41 in one touch detection period, a number of detection values equal to the number of pulses of the touch drive signal TX in one touch detection period can be obtained. In other words, each detected value is a difference value between the capacitance of the electrode 41 and the reference capacitance. The larger the amount of change in the capacitance of the electrode 41 due to touch, the larger the detected value. If there is no touch and the amount of change in the capacitance of the electrode 41 is zero, the detected value is zero.

When the operation mode is the normal mode, the data detection unit 23 receives the touch detection signal RX from all of the plurality of electrodes 41 and calculates the detection values of all of the plurality of electrodes 41. On the other hand, when the operation mode is the specific mode, the data detection unit 23 receives the touch detection signal RX only for a part of the electrodes 41 corresponding to the display position of the second image data, and the data detection unit 23 receives the touch detection signal RX only for the part of the electrodes 41. Calculate the detected value of.

The second image data may be displayed in scan block units, and the detected values of some electrodes 41 may be calculated in scan block units. Further, the data detection unit 23 may receive the touch detection signal RX from all of the plurality of electrodes 41 and calculate the detection value only for a part of the electrodes 41 corresponding to the display position of the second image data.

Then, the panel control unit 20 acquires the detection value from the second drive unit 22, and calculates the sum of the plurality of detection values obtained from one touch detection period. That is, the panel control unit 20 calculates the sum of one detection value for each touch detection period.

Then, the panel control unit 20 compares the calculated sum of the detected values with the predetermined touch detection threshold value, and if the sum of the detected values is equal to or greater than the touch detection threshold value, the panel control unit 20 touches the position of the corresponding electrode 41. Is determined.

Further, the panel control unit 20 detects the touch position in the display area of the panel unit 4 based on the position of the electrode 41 determined to have touch. The panel control unit 20 derives the coordinate data of the touch position based on the detected information of the touch position, and outputs the coordinate data to the control device 11.

The panel control unit 20 detects the presence / absence of touch and the touch position based on the sum of the detected values when the operation mode is the normal mode, but detects when the operation mode is the specific mode. Only the presence or absence of touch is detected based on the sum of the values. That is, the panel control unit 20 does not detect the touch position when the operation mode is the specific mode.

Further, when the panel control unit 20 determines that there is a touch in the specific mode, the panel control unit 20 outputs the instruction code assigned to the second image data to the host 10.

Next, an operation example of the display system S in each operation mode of the normal mode M1 and the specific mode M2 will be described with reference to FIGS. 3 and 4. FIG. 3 is a sequence diagram showing an operation example of the display system S in the normal mode M1. FIG. 4 is a sequence diagram showing an operation example of the display system S in the specific mode M2.

First, an operation example of the display system S in the normal mode M1 will be described with reference to FIG. As shown in FIG. 3, first, the host 10 generates the first image data and transmits it to the display device 1 (step S101).

Subsequently, the panel control unit 20 of the display device 1 receives the first image data and generates image display data for display on the panel unit 4 based on the first image data (step S102).

Subsequently, the first drive unit 21 acquires the image display data from the panel control unit 20 and drives the electrode 41 of the panel unit 4 by the video signal based on the image display data (step S103), so that the panel unit 4 The first image data is displayed in the display area of (step S104).

Further, the host 10 transmits a control signal for controlling the touch function to the display device 1 in accordance with the transmission of the first image data (step S105). The panel control unit 20 drives the electrodes of the panel unit 4 by controlling the second drive unit 22 in accordance with the display timing of the first image data based on the received control signal (control data) (step). S106). That is, the second drive unit 22 generates the touch drive signal TX according to the control of the panel control unit 20, and supplies the touch drive signal TX to each of the plurality of electrodes 41. As a result, touch detection is possible while displaying the first image data.

Then, the panel unit 4 outputs the touch detection signal RX corresponding to the user's operation to the electrode 41 to which the touch drive signal TX is supplied to the data detection unit 23 (step S107). Subsequently, the data detection unit 23 acquires the touch detection signal RX from all of the plurality of electrodes 41 in the panel unit 4 (step S108).

Subsequently, the data detection unit 23 calculates a detection value for each of the plurality of electrodes 41 based on the touch detection signal RX (step S109). Subsequently, the panel control unit 20 calculates the presence / absence of touch and the touch position based on the detected value, and transmits the information on the presence / absence of touch and the touch position to the host 10 (step S110). Specifically, the panel control unit 20 detects a position corresponding to the electrode 41 whose detected value is equal to or higher than the threshold value as a touch position (with touch).

Subsequently, the host 10 determines the presence / absence of touching the specific position and the touch position in the first image data based on the received touch position information (step S111). The specific position is an area such as a display button in the first image data, and is an area that can be operated by an occupant who is a user.

Subsequently, the host 10 executes an instruction based on the instruction code assigned to the touched specific position (step S112). When the instruction code includes an instruction to the peripheral device 100, the host 10 transmits an instruction execution indicating that the instruction is executed to the corresponding peripheral device 100 (step S113). Then, the peripheral device 100 executes the instruction based on the instruction execution (step S114).

Next, an operation example of the display system S in the specific mode M2 will be described with reference to FIG. In FIG. 4, it is assumed that the mode is switched to the specific mode M2 before step S201. As shown in FIG. 4, first, the panel control unit 20 reads out the image information 31 which is the second image data from the storage unit 3 (step S201). That is, in the specific mode M2, the second image data stored in advance in the own device is read out instead of acquiring the first image data from the host 10.

Subsequently, the panel control unit 20 of the display device 1 generates image display data for display on the panel unit 4 based on the second image data (step S202).

Subsequently, the first drive unit 21 acquires the image display data from the panel control unit 20 and drives the electrode 41 of the panel unit 4 by the video signal based on the image display data (step S203), so that the panel unit 4 The second image data is displayed in the display area of (step S204).

Further, the panel control unit 20 acquires the display timing of the second image data (step S205) and controls the second drive unit 22 in accordance with the display timing to drive the electrodes of the panel unit 4 (step S205). Step S206). That is, the second drive unit 22 generates the touch drive signal TX according to the control of the panel control unit 20, and supplies the touch drive signal TX to each of the plurality of electrodes 41. As a result, touch detection is possible while displaying the second image data.

Then, the panel unit 4 outputs the touch detection signal RX corresponding to the user's operation to the electrode 41 to which the touch drive signal TX is supplied to the data detection unit 23 (step S207). Subsequently, the data detection unit 23 acquires the touch detection signal RX from a part of the electrodes 41 corresponding to the display position of the second image data in the display area of the panel unit 4 (step S208).

Subsequently, the data detection unit 23 calculates a detection value for each of the some electrodes 41 based on the touch detection signal RX (step S209). Subsequently, the panel control unit 20 determines the presence / absence of touch based on the detected value (step S210). Specifically, the panel control unit 20 determines that a touch has been made (with a touch) when the detected value exceeds the threshold value. That is, in the specific mode, only the presence or absence of touch is determined, and the touch position is not calculated.

Subsequently, when the panel control unit 20 determines that the touch has been made, the panel control unit 20 transmits the instruction code assigned to the second image data to the host 10 (Tep S211). Then, the host 10 executes an instruction based on the received instruction code (step S212). When the instruction code includes an instruction to the peripheral device 100, the host 10 transmits an instruction execution indicating that the instruction is executed to the corresponding peripheral device 100 (step S213). Then, the peripheral device 100 executes the instruction based on the instruction execution (step S214).

As described above, according to the display device 1 according to the first embodiment, even when a display abnormality of the first image data occurs, the second image data stored in advance is displayed and the user touches it. Is received and a process execution command is issued. As a result, even if an image abnormality of the display device 1 occurs, the occupant can perform an operation for executing a predetermined process in the specific mode, so that the occupant may be confused by the abnormality of the display device 1. It can be avoided. That is, according to the control method of the display device 1 according to the embodiment, even when an image abnormality of the display device 1 occurs, the occupant can be given a sense of security.

The display device 1 can display the second image data at an arbitrary display position of the panel unit 4 when the first image data is abnormal. For example, the display device 1 of the panel unit 4 (electrode 41, etc.) If the display area at a specific position is abnormal due to a failure, the second image data is displayed at a display position other than the display area.

Next, a screen example of the second image data in the panel unit 4 will be described with reference to FIGS. 5 and 6. 5 and 6 are views showing a screen example of the second image data in the panel unit 4. The screen 500 shown in FIGS. 5 and 6 corresponds to a display area in the panel unit 4.

As shown in FIG. 5, the second image data is displayed at a predetermined display position as the icon image data 31 on the screen 500. The icon image data 31 is information that symbolizes a predetermined process executed by an in-vehicle system such as the host 10 or the peripheral device 100. In the example shown in FIG. 5, the icon image data 31 symbolizing the process of "call the store" is displayed.

Then, the display device 1 drives the electrodes 41 in the region corresponding to the display position of the icon image data 31 to enable a touch operation on the icon image data 31. That is, the display device 1 displays the icon image data 31 in a part of the display area in the panel unit 4, and also displays the touch detection signal RX of the electrode 41 corresponding to at least a part of the electrodes 41 among the plurality of electrodes 41. The presence or absence of touch is determined based on this.

The touch detection signal RX to be received may be all of the plurality of electrodes 41, or may be only a part of the electrodes 41 corresponding to the icon image data 31. Specifically, the display device 1 receives the touch detection signals RX of all of the plurality of electrodes 41, and among the received touch detection signals RX, the touch of some of the electrodes 41 corresponding to the display position of the icon image data 31. The presence or absence of touch may be determined by selectively using only the detection signal RX. Alternatively, the display device 1 may determine the presence or absence of touch by receiving only the touch detection signal RX of some of the electrodes 41 corresponding to the display position of the icon image data 31.

The display device 1 does not drive the electrode 41 other than the area corresponding to the display position of the icon image data 31 (does not output the touch drive signal TX), so that the area other than the icon image data 31 is touched. The operation may be disabled. Alternatively, the display device 1 may output the touch drive signal TX to all of the plurality of electrodes 41 and receive the touch detection signal RX only from the electrodes 41 corresponding to the display positions of the icon image data 31.

Then, when the icon image data 31 "Call the dealer" is touched by the user, the peripheral device 100 (telephone) executes a process of calling the dealer, and the host 10 turns on the microphone and the speaker in the car. Execute the process.

Although FIG. 5 shows a case where only the icon image data 31 is displayed as the second image data, for example, as shown in FIG. 6, the text data 31b related to the icon image data 31 is also displayed. May be good. In the example shown in FIG. 6, the telephone number of the store is displayed as the text data 31b.

Since the display device 1 does not require a touch operation for the text data 31b, the display device 1 does not drive the electrode 41 in the region corresponding to the display position of the text data 31b.

Further, since the icon image data 31a accepts a touch operation, it is preferable that the icon image data 31a is displayed at a display position and a display size corresponding to the touch detection area. The touch detection region is a region in which one screen is divided into a plurality of regions along the boundaries of the plurality of electrodes 41. That is, each touch detection region includes at least one or more electrodes 41, and the boundary between adjacent touch detection regions corresponds to the boundary between adjacent electrodes 41. This touch detection area is also called a scan block, which is a unit for reading a touch detection signal in one touch detection period.

Here, an example of dividing the screen 500 will be described with reference to FIGS. 7 to 9. 7 to 9 are views showing a division example of the screen 500. For example, as shown in FIG. 7, the display device 1 divides the screen 500 into four touch detection areas 530a to 530d.

Then, the display device 1 displays the icon image data 31 in an arbitrary touch detection area 530c out of the four touch detection areas 530a to 530d. The icon image data 31 is stored in advance in the storage unit 3 as display size information that matches the area sizes of the touch detection areas 530a to 530d.

As a result, the display device 1 can determine only the display position of the icon image data 31 and omit the display size adjustment process. Then, the control unit 2 sets the touch detection area 530c as the touchable area 510 by driving the electrode 41 of the touch detection area 530c on which the icon image data 31 is displayed.

On the other hand, by not driving the electrodes 41 of the touch detection regions 530a, 530b, and 530d other than the touch detection region 530c, the touch detection regions 530a, 530b, and 530d are designated as non-touchable regions 520. Further, as shown in FIG. 8, the text data 31b that does not require a touch operation is displayed in the non-touchable area 520.

Note that FIGS. 7 and 8 show a case where the icon image data 31a is displayed in one touch detection area 530c, but the present invention is not limited to this, and for example, the icon image data 31a is displayed in a plurality of touch detection areas. May be good. This point will be described with reference to FIG.

As shown in FIG. 9, the control unit 2 may display the icon image data 31a in two adjacent touch detection areas 530c and 530d. In such a case, since the icon image data 31a is stored in a display size corresponding to one touch detection area, the display size is expanded according to the area sizes of the two touch detection areas 530c and 530d.

Then, the control unit 2 drives the electrodes 41 of the two touch detection regions 530c and 530d on which the icon image data 31 is displayed to make the two touch detection regions 530c and 530d the touchable regions 510.

On the other hand, the touch detection regions 530a and 530b are designated as non-touchable regions 520 by not driving the electrodes 41 of the touch detection regions 530a and 530b other than the touch detection regions 530c and 530d.

In FIGS. 7 to 9, each of the four touch detection areas 530a to 530d extends in the vertical direction and is divided in the left-right direction. For example, each of the four touch detection areas extends in the left-right direction. It may be extended and divided so as to line up in the vertical direction.

Further, the number of divisions is not limited to 4, and may be 3 or less or 5 or more. Further, the screen 500 may be divided into vertical and horizontal directions. Further, each touch detection area is not limited to the same area size, and the area size of each touch detection area on one screen 500 may be different.

As described above, in the present embodiment, when the operation mode is the specific mode, the screen 500 is divided into a plurality of areas, and if the presence or absence of touch in the predetermined touchable area can be detected, the touch position coordinates can be obtained. Since it is not necessary to perform the calculation, the load of the arithmetic processing can be reduced. Further, in the present embodiment, when the icon image data is displayed in the touch detection area, the calculation of the touch position coordinates is unnecessary if the presence / absence of touch in the touch detection area corresponding to the icon image can be detected. The load on the device can be further reduced.

<Second embodiment>
Next, the second embodiment will be described with reference to FIG. The second embodiment is different from the first embodiment in that the abnormality of the image display is a communication abnormality between the display device 1 and the host 10. Regarding the second embodiment, the functional configuration of each device and the operation in the normal mode M1 are the same as those of the first embodiment, and thus the description thereof will be omitted. Here, an operation example in the specific mode M2, which is a difference between the second embodiment and the first embodiment, will be described with reference to FIG.

FIG. 10 is a diagram showing an operation example of the display system S according to the second embodiment. As shown in FIG. 4, first, the panel control unit 20 reads out the image information 31 which is the second image data from the storage unit 3 (step S301). That is, in the specific mode M2, the second image data stored in advance in the own device is read out instead of acquiring the first image data from the host 10.

Subsequently, the panel control unit 20 of the display device 1 generates image display data for display on the panel unit 4 based on the second image data (step S302).

Subsequently, the first drive unit 21 acquires image display data from the panel control unit 20 and drives the electrode 41 of the panel unit 4 based on the image display data (step S303) to display the panel unit 4. The second image data is displayed in the area (step S304).

Further, the panel control unit 20 acquires the display timing of the second image data (step S305), and controls the second drive unit 22 in accordance with the display timing to drive the electrodes of the panel unit 4 (step S305). Step S306). That is, the second drive unit 22 generates the touch drive signal TX according to the control of the panel control unit 20, and supplies the touch drive signal TX to each of the plurality of electrodes 41. As a result, touch detection is possible while displaying the second image data.

Then, the panel unit 4 outputs the touch detection signal RX according to the user's operation to the data detection unit 23 (step S307). Subsequently, the data detection unit 23 acquires the touch detection signal RX from a part of the electrodes 41 corresponding to the display position of the second image data in the display area of the panel unit 4 (step S308).

Subsequently, the data detection unit 23 calculates a detection value for each of the some electrodes 41 based on the touch detection signal RX (step S309). Subsequently, the panel control unit 20 determines the presence / absence of touch based on the detected value (step S310). Specifically, the panel control unit 20 determines that the touch has been made (yes) when the detected value becomes equal to or higher than the threshold value. That is, in the specific mode, only the presence or absence of touch is determined, and the touch position is not calculated.

Subsequently, when the panel control unit 20 determines that the touch has been made, the panel control unit 20 directly transmits the instruction code assigned to the second image data to the peripheral device 100 (Tep S311). Then, the peripheral device 100 executes an instruction based on the received instruction code (step S312).

That is, as shown in step S311, in the second embodiment, since a communication abnormality has occurred between the display device 1 and the host 10, the instruction code is not transmitted to the host 10 but to the peripheral device 100. Send.

As described above, according to the display device 1 according to the second embodiment, even when a communication abnormality occurs with the host 10, a predetermined process can be executed without going through the host 10, so that the occupant Can be avoided from being confused by the abnormality of the display device 1. That is, according to the control method of the display device 1 according to the embodiment, even when an image abnormality of the display device 1 occurs, the occupant can be given a sense of security.

<Third embodiment>
Next, a third embodiment will be described with reference to FIGS. 11 and 12. The third embodiment is different from the first embodiment in that the panel portion 4 is an out-cell type, and the panel portion 4 is an in-cell type.

FIG. 11 is a block diagram showing a configuration example of the display system S according to the third embodiment. In the case of the out-cell type, the panel unit 4 has a display electrode 41a for displaying an image and a touch electrode 41b for performing touch detection independently arranged. In other words, in the panel unit 4, a display panel for displaying an image and a touch panel for performing touch detection are independently laminated.

Further, the control unit 2 according to the third embodiment includes a display control unit 20a and a touch control unit 20b in place of the panel control unit 20 according to the first embodiment. The display control unit 20a controls the first drive unit 21. Further, the touch control unit 20b controls the second drive unit 22. That is, in the third embodiment, among the functions of the panel control unit 20, the display control unit 20a is responsible for the function of controlling the first drive unit 21, and the touch control unit 20b is responsible for the function of controlling the second drive unit 22. Carry.

That is, in the first embodiment, the panel control unit 20 cooperates with the control of the first drive unit 21 and the control of the second drive unit 22, but in the third embodiment, the first drive unit The display control unit 20a and the touch control unit 20b independently control the unit 21 and the second drive unit 22.

Next, an operation example of the display system S in the specific mode M2 will be described with reference to FIG. FIG. 12 is a sequence diagram showing an operation example of the display system S in the specific mode M2 according to the third embodiment. In FIG. 12, the control unit 2 is divided into "display control unit 20a", "touch control unit 20b", and "others". “Other” includes the first drive unit 21, the second drive unit 22, and the data detection unit 23.

As shown in FIG. 12, first, the display control unit 20a reads out the image information 31 which is the second image data from the storage unit 3 (step S401).

Subsequently, the display control unit 20a generates image display data to be displayed on the panel unit 4 based on the second image data, and controls the first drive unit 21 (step S402).

Subsequently, the first drive unit 21 drives the display electrode 41a of the panel unit 4 under the control of the display control unit 20a (step S403) to display the second image data in the display area of the panel unit 4 (step S403). Step S404).

Further, the touch control unit 20b acquires the display timing of the second image data from the display control unit 20a and controls the second drive unit 22 according to the display timing (step S405), whereby the panel unit 4 The touch electrode 41b is driven (step S406). That is, the second drive unit 22 generates the touch drive signal TX according to the control of the touch control unit 20b, and supplies the touch drive signal TX to each of the plurality of touch electrodes 41b. As a result, touch detection is possible by the touch electrode 41b while displaying the second image data by the display electrode 41a.

Then, the panel unit 4 outputs the touch detection signal RX according to the user's operation to the data detection unit 23 (step S407). Subsequently, the data detection unit 23 acquires the touch detection signal RX from each of the touch electrodes 41b (step S408).

Subsequently, the data detection unit 23 calculates the detection value for each of the touch electrodes 41b based on the touch detection signal RX (step S409). Subsequently, the touch control unit 20b determines the presence or absence of touch based on the detection value excluding the detection value of the touch electrode 40b corresponding to the region other than the display position of the second image data, which is an unnecessary detection value (step). S410).

That is, in the specific mode, the data detection unit 23 acquires the touch detection signal RX from each of the plurality of touch electrodes 41b, and among the touch detection signals, the touch corresponding to a part of the display area corresponding to the second image data. The touch detection signal RX of the electrode 41b is selected, and the presence or absence of touch is determined based on the selected touch detection signal RX. As a result, even if it is an out-cell type, it is possible to determine with high accuracy whether or not there is a touch on the second image data.

Subsequently, when the touch control unit 20b determines that the touch has been touched, the touch control unit 20b transmits the instruction code assigned to the second image data to the host 10 (Tep S411). Then, the host 10 executes an instruction based on the received instruction code (step S412). When the instruction code includes an instruction to the peripheral device 100, the host 10 transmits an instruction execution indicating that the instruction is executed to the corresponding peripheral device 100 (step S413). Then, the peripheral device 100 executes the instruction based on the instruction execution (step S414).

As described above, the display device 1 according to the first to third embodiments includes a panel unit 4 and a control unit 2. The panel unit 4 has a plurality of electrodes 41 (including display electrodes 41a and touch electrodes 41b) that perform image display and touch detection, respectively. The control unit 2 controls the panel unit 4 in the first mode (normal mode M1) when an abnormality related to the image display is not detected, and in the second mode (specific mode M2) when an abnormality is detected. Controls the panel unit 4. Further, in the first mode, the control unit 2 displays the first image data acquired from the in-vehicle system (host 10 and peripheral device 100) on the panel unit 4, and is based on the touch detection signal RX acquired from the panel unit 4. The touch position is calculated and the touch position is output to the in-vehicle system. In the second mode, the second image data stored in advance is displayed on the panel unit 4, and is based on the touch detection signal RX acquired from the panel unit 4. The presence or absence of a touch is determined, and when the touch is made, an execution command for a predetermined process is output to the in-vehicle system. As a result, even if an abnormality occurs in the image display, the occupant can be given a sense of security.

Further, as described above, the display system S according to the first to third embodiments includes a display device 1 and a host 10. The display device 1 includes a panel unit 4 and a control unit 2. The panel unit 4 has a plurality of electrodes 41 (including display electrodes 41a and touch electrodes 41b) that perform image display and touch detection, respectively. The control unit 2 controls the panel unit 4 in the first mode (normal mode M1) when an abnormality related to image display is not detected, and in the second mode (specific mode M2) when an abnormality is detected. Controls the panel unit 4. Further, in the first mode, the control unit 2 displays the first image data acquired from the in-vehicle system (host 10 and peripheral device 100) on the panel unit 4, and is based on the touch detection signal RX acquired from the panel unit 4. The touch position is calculated and the touch position is output to the in-vehicle system. In the second mode, the second image data stored in advance is displayed on the panel unit 4, and is based on the touch detection signal RX acquired from the panel unit 4. The presence or absence of a touch is determined, and when the touch is made, an execution command for a predetermined process is output to the in-vehicle system. As a result, even if an abnormality occurs in the image display, the occupant can be given a sense of security.

<Modification example>
In addition to the above-described embodiment, for example, the configurations shown in FIGS. 13 and 14 can be adopted depending on the product form. FIG. 13 is a diagram showing a configuration example of the in-vehicle device 200 according to the modified example. FIG. 14 is a diagram showing a configuration example of the display system S according to the modified example.

For example, as shown in FIG. 13, the host 10 and the display device 1 may be integrated as an in-vehicle device 200. Further, as shown in FIG. 14, the display device 1 may be shared with the meter. Specifically, the panel unit 4 of the display device 1 has an image area 400 on which the first image data and the second image data are displayed, and a meter area 410 on which the meter is displayed.

Further, in addition to the screen example according to the above-described embodiment, for example, a screen example as shown in FIG. 15 can be adopted. FIG. 15 is a diagram showing a screen example according to a modified example. As shown in FIG. 15, an information code 31c such as a two-dimensional bar code may be displayed together with the icon image data 31a. Information related to the icon image data 31a (details such as a telephone number and an address of a store) is embedded in the information code 31c. The information code 31c is not limited to the two-dimensional bar code, and any code can be adopted as long as the information can be embedded.

By displaying the information code 31c together in this way, the dealer is contacted from the occupant's terminal via the information code 31c, except when the dealer is contacted via the touch operation on the icon image data 31a. be able to. That is, it is possible to provide redundancy in dealing with the occupants when the image display is abnormal.

The program for executing the various processes in the above-described embodiment has a module configuration including each of the plurality of functional units, and the actual hardware includes, for example, a CPU (processor circuit). Reads an information processing program from a ROM or HDD and executes it, so that each of the plurality of functional units described above is loaded on the RAM (main memory), and each of the plurality of functional units described above is stored on the RAM (main memory). It is designed to be generated in. It is also possible to realize a part or all of each of the plurality of functional units described above by using dedicated hardware such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array).

Although the embodiment has been described above, the embodiment is presented as an example and is not intended to limit the scope of the present disclosure. The new embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. The above-described embodiment is included in the scope or gist of the present disclosure, and is also included in the invention described in the claims and the equivalent scope thereof.

(Additional note)
An in-vehicle system including a host and peripheral devices, and a display system including a display device.
The display device is
A panel unit having a plurality of electrodes for displaying an image and detecting a touch,
When the abnormality related to the image display is not detected, the panel unit is controlled in the first mode, and when the abnormality is detected, the panel unit is controlled in the second mode.
With
The control unit
In the first mode, the first image data acquired from the in-vehicle system is displayed on the panel unit, the touch position is calculated based on the touch detection signal acquired from the panel unit, and the touch position is transmitted to the in-vehicle system. Output and
In the second mode, the second image data stored in advance is displayed on the panel unit, and the presence or absence of a touch is determined based on the touch detection signal acquired from the panel unit. Outputs an execution command for a predetermined process to the in-vehicle system.
Display system.

1 Display device 2 Control unit 3 Storage unit 4 Panel unit 10 Host 11 Control unit 20 Panel control unit 21 1st drive unit 22 2nd drive unit 23 Data detection unit 31 Image information 32 Mode information 41 Electrode 100 Peripheral device 200 In-vehicle device S Display system

Claims (10)

A panel unit having a plurality of electrodes for displaying an image and detecting a touch,
When the abnormality related to the image display is not detected, the panel unit is controlled in the first mode, and when the abnormality is detected, the panel unit is controlled in the second mode.
With
The control unit
In the first mode, the first image data acquired from the in-vehicle system is displayed on the panel unit, the touch position is calculated based on the touch detection signal acquired from the panel unit, and the touch position is transmitted to the in-vehicle system. Output and
In the second mode, the second image data stored in advance is displayed on the panel unit, and the presence or absence of a touch is determined based on the touch detection signal acquired from the panel unit. A display device that outputs an execution command for a predetermined process to the in-vehicle system. The second image data includes icon image data in which the predetermined process is symbolized.
The control unit
In the second mode, the icon image data is displayed in a part of the display area in the panel portion, and the touch detection signal of the electrode corresponding to at least a part of the display area among the plurality of electrodes is displayed. The display device according to claim 1, wherein the presence or absence of the touch is determined based on the above. The control unit
In the second mode, the touch detection signal is acquired from the electrodes corresponding to the part of the display area among the plurality of electrodes, and the presence or absence of the touch is determined based on the acquired touch detection signal. The display device according to claim 2. The control unit
In the second mode, the touch detection signal is acquired from each of the plurality of electrodes, and among the acquired touch detection signals, the touch detection signal of the electrode corresponding to the part of the display area is selected and selected. The display device according to claim 2, wherein the presence or absence of the touch is determined based on the touch detection signal. The plurality of electrodes
The display device according to any one of claims 1 to 4, which is an electrode shared in the image display and the touch detection. The plurality of electrodes
The display device according to claim 4, wherein the first electrode used for the image display and the second electrode used for the touch detection are arranged independently of each other. The control unit
Claims 1 to 6 control the panel unit in the second mode when the first image data acquired from the vehicle-mounted system is abnormal or the communication with the vehicle-mounted system is abnormal. The display device according to any one of the above. The in-vehicle system includes a host and peripheral devices.
The control unit
When the first image data acquired from the in-vehicle system is abnormal, the execution instruction is output to the host.
The display device according to claim 7. The in-vehicle system includes a host and peripheral devices.
The control unit
When the communication with the in-vehicle system is abnormal, the execution instruction is output to the peripheral device.
The display device according to claim 7. It is a control method of a display device including a panel portion having a plurality of electrodes for performing image display and touch detection.
When the abnormality related to the image display is not detected, the panel unit is controlled in the first mode, and when the abnormality is detected, the panel unit is controlled in the second mode.
In the first mode, the first image data acquired from the in-vehicle system is displayed on the panel unit, the touch position is calculated based on the touch detection signal acquired from the panel unit, and the touch position is transmitted to the in-vehicle system. Output and
In the second mode, the second image data stored in advance is displayed on the panel unit, and the presence or absence of a touch is determined based on the touch detection signal acquired from the panel unit. A display device control method for outputting an execution command of a predetermined process to the in-vehicle system.

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